SOLUTION: The present age of a girl is two fifth the age of her father.Express the above statement as a linear equation in two varible. Also answer the following questions:- a. The age of t

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The present age of a girl is two fifth the age of her father.Express the above statement as a linear equation in two varible. Also answer the following questions:- a. The age of t      Log On


   

Question 725564: The present age of a girl is two fifth the age of her father.Express the above statement as a linear equation in two varible. Also answer the following questions:-
a. The age of the girl when father is 40 years.
B. The age of father when the girl is 22 years.
Answer by god2012(113) About Me  (Show Source):
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Let 'g' be the present age of the girl and 'f' be the age of the father.
Therefore, g = (2/5)f or
5g - 2f = 0 is the required equation
a. When f = 40
g = (2/5)*40 = 16 years
b.When g = 22
f = (5/2)*22 = 55 years